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authorKevin Wolf <kwolf@redhat.com>2019-01-25 17:30:28 +0100
committerKevin Wolf <kwolf@redhat.com>2019-02-01 13:47:09 +0100
commita8f58afcdb86e266e06c9dc41a71605e570244c3 (patch)
tree134ff16e7c26dedbdbb60d951eb8be111c8a39b2 /MAINTAINERS
parenta5df73baaf27a2aa4a911545ee1ee6286a5372e4 (diff)
scsi-disk: Don't use empty string as device id
scsi-disk includes in the Device Identification VPD page, depending on configuration amongst others, a vendor specific designator that consists either of the serial number if given or the BlockBackend name (which is a host detail that better shouldn't have been leaked to the guest, but now we have to maintain it for compatibility). With anonymous BlockBackends, i.e. scsi-disk devices constructed with drive=<node-name>, and no serial number explicitly specified, this ends up as an empty string. If this happens to more than one disk, we have accidentally signalled to the OS that this is a multipath setup, which is obviously not what was intended. Instead of using an empty string for the vendor specific designator, simply leave out that designator, which makes Linux detect such setups as separate disks again. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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